My tank is very basic, I simply have a hang-on-tank filter, and will soon have a prizm hang on tank protein skimmer (my gf has one for sale, and I am giving my friend first dibs on it since he is new to the hobby; so I will be getting either that one or a new one if he wants it). It is a 29g and I felt that running a sump was simply more trouble than it was worth. I just set one up on my 60g and it was just more time/effort/money than I felt was neccessary here. Who knows, maybe I'm dead wrong :P :P
As an update on this, I honestly don't know what the heck I have been thinking about all of this. I have no trouble with heating problems as I have suggested. This tank has a hang-on-tank filter which generates about No heat, but all of the heat is coming from the 4 medium-large powerheads I have in this tank cycling the LR. There should be no reason for the tank to be much higher than ambient temperature here, which is around 72... so I guess this whole post is kind of silly. It has definitely made me consider ways to try to reduce temperature using external fans though.
Will let you guys know what my tank temperature ends up being in a couple weeks when I get things more stablized and ready for the octo 8)
Robert